Identify the scope and boundary of the count

Once you have created Development Project Count the Function Point Modeler Diagram Editor will be launched.

Function Point Modeler Workbench

Before we go further with the count, we have to know the scope and boundary of the count. Function Point Modeler distinguish between Application System and Sub System

Name Definition
Application System The Application System indicates the software being measured. An Application System includes one ore more Sub System You can add to an Application Count only one Application System . But Development Project Count or Enhancement Project Count may contain more than an Application System . It is recommended is general one Application System per Function Point Count
Sub System Sub System are a type of stereotyped component that represent independent, behavioral units in a system. Sub System are used to represent large-scale components in the system that you are modeling. You can model an entire Application System as a hierarchy of Sub System .